{"product_id":"carrier-c48a502552-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C48A502552","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C48A502552\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C48A502552\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the system goes completely unresponsive: the thermostat goes blank, the unit will not energize, and no heating or cooling calls are answered. A failed transformer is one of the most commonly misdiagnosed \"dead system\" faults in packaged HVAC equipment.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched to Carrier C48A502552 control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer meets Carrier's exact VA rating and insulation class specifications. Undersized or off-brand transformers can overheat, trip their internal fuse repeatedly, or fail to sustain 24V under full control circuit load — leading to nuisance lockouts and callbacks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Always label or photograph existing wiring before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC48A502552\u003c\/strong\u003e packaged unit. Confirm your existing transformer's primary voltage, secondary voltage, and VA rating on the data plate before ordering to ensure a proper fit. Our HVAC parts specialists are available to verify fitment before you purchase — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909735829875,"sku":"CARRIE-C48A502552-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909735862643,"sku":"CARRIE-C48A502552-TRANSFORMER-HT01BD236-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD236_bdc27913-031c-4fbc-870d-3309c3952f74.jpg?v=1782940172","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a502552-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}